<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>班级点名程序</title>
	<script type="text/javascript">
        function dianMing(num){
        	num+=1;
            alert(Math.floor(Math.random()*(num-1)+1));
        }
        dianMing(55);
	</script>
</head>
<body>
	
</body>
</html>